Question

write a program in python to check whether a number is a happy number or not . using recursion. do not use loop​

Answer 1

• HOPE it helps ☝ to you
• happy numbers always ends with 1

Answer 2

A program in python to check whether a number is a happy number or not is as follows:

def happy_number(x):  

   remainder = sum = 0

   while(x > 0):  

        remainder = x%10

        sum = sum + (remainder*remainder)

        x = x//10

   return sum

x = 19

res = x

while(res != 1 and res != 4) :  

       res = happy_number(res)

if (res == 1):  

       print(str (x) + " is a Happy Number");  

elif (res == 4):  

       print(str (x) + " is not a Happy Number");